package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
@Transactional
public class DishServicelmpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 菜品新增
     * @param dishDTO
     * @return
     */
    public void saveWithFalvor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //菜品表传入数据
        dishMapper.insert(dish);
        //获取返回的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
       if (flavors != null && flavors.size() > 0){
           for (DishFlavor dishFlavor : flavors) {
               dishFlavor.setDishId(dishId);
           }
           //口味表插入数据
           dishFlavorMapper.insertBatch(flavors);
       }
    }
    /**
     * 菜品查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 删除菜品
     * @param ids
     * @return
     */
    @Transactional
    public void deleteBatch(com.sun.tools.javac.util.List<Long> ids) {
        //判断当前菜品是否能够删除--是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                //当菜品起售，不可以删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除--是否套餐被关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);

        if (setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
       /* for (Long id : ids) {
            dishMapper.delete(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/

        //代码改进 dao层遍历 提高效率
        dishMapper.deleteById(ids);

        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);

       List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);

       DishVO dishVO = new DishVO();
       BeanUtils.copyProperties(dish,dishVO);

       dishVO.setFlavors(dishFlavor);
        return dishVO;
    }

    /**
     * 更新菜品
     * @param dishDTO
     * @return
     */
    public void updateWithFalvor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(flavor -> {
                flavor.setDishId(dishDTO.getId());
            });
            //像口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public com.sun.tools.javac.util.List<DishVO> listWithFlavor(Dish dish) {

            List<Dish> dishList = dishMapper.list(dish);

            List<DishVO> dishVOList = new ArrayList<>();

            for (Dish d : dishList) {
                DishVO dishVO = new DishVO();
                BeanUtils.copyProperties(d,dishVO);

                //根据菜品id查询对应的口味
                List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

                dishVO.setFlavors(flavors);
                dishVOList.add(dishVO);
            }
            return (com.sun.tools.javac.util.List<DishVO>) dishVOList;
        }

}
